No reservations created. Problem with domain

The plugin no reservation create. After many migrations, we discovered that the problem only occurs with a particular domain “cambridgeinstitute.net”, is it possible?

Currently the initial website “https://videoconferencebookingprueba.iseec.es/gestion/” works without problems, but its exact copy “https://reservationvideoconference.cambridgeinstitute.net/gestion/” does not work.

We have been using your plugin for a long time and problems have recently appeared.

Could you help us?

Thank you

The page I need help with: [log in to see the link]